Dunlop Sport4000a/s

I have a pair of the Dunlop SP Sport 4000 a/s 225/50 - 16 on the front of my 300ZX. They started out as a pretty good tire, wet or dry. But as they got about 1 year old, with 25,000 miles they started to hum like tires on a 4x4 when driving around 60 mph. I'm considering new tires. Maybe the GoodYear GS-D, or the Bridgestone RE71. Not only for the performance, but for quiet. Any comments?